Q1=Q2
Cm(t1-5)=Cжелеза*m(t1-5)
4200*0.1*13=c*m*9
m=4200*0.1*13/ с*9
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Q1=Q2
Cm(t1-5)=Cжелеза*m(t1-5)
4200*0.1*13=c*m*9
m=4200*0.1*13/ с*9